使用grep输出可用磁盘空间

Question

I'm trying to create a terminal command which outputs the free disk space of the main HDD. When entering: diskutil info disk1s4 | grep -o "Free Space:.* GB" diskutil info disk1s4 | grep -o "Free Space:.* GB" The result is: Free Space: 252.3 GB

I get the correct information but also Free Space: which I don't want.

Is there a flag I can set which just shows me the results of the wildcard and not the surrounding text ?

I tried Using -A 0 -B 0 to limit the lines. removing the -o flag

The end result should be 252.3 GB .

Answer 1

You could try awk instead.

diskutil info disk1s4 | awk '/Free Space:.* GB/ {print $3}'

Or to get the GB at the end.

diskutil info disk1s4 | awk '/Free Space:.* GB/ {print $3,$4}'